DE1931647B2 - HEATING GAS GENERATOR FOR A SYSTEM FOR SURFACE TREATMENT, E.G. OF PAINTED OBJECTS WITH A TREATMENT, E.G. PAINT DRYING CHAMBER - Google Patents

Description

closed and this on their the supply channel (25) adjacent and at its other end (at 34, 35) with a surrounding one Return channel (36) connected ts :. of them. Jie Gemi: ch derivative (37, 37 «. 41) contrary to the *> Direction of flow in the exhaust air inlet duct (25). Gas generator according to claim. through this gekcnnzcichnv .. that the flame chamber (26) reinforced the wall (23) separating the drainage duct (25) with means '«'" Heat exchange, e.g. B. with R> pcn. Needles (27) or the like. Is given away.

X Heating gas generator according to Claim 1 or 2, characterized in that the exhaust air supply from * «*"

'f ^ iei / gascr / cuger arising or transgressing _{in the d} * _Mischkainmcr

ascr / cuger emerge _Mischkainmcr transgressing

", Irritations known (German _{2R) at dcncn e} in combustion _{chamber- ^^ for} heating, e.g. a baking or drying oven, <£ - ^^ 'Ai

H? ^rc " ^d .f""^""fane distributed passage openings over semen IInitanj, ^ _n ^ _gckühHcn

«^ ^ ₁ ; ^{h of} _a gas enveloping the flame, BHm fc. ^^ _w . _{fd Dje Mischun dcr}

SSnrtcn ^{ciasc with de} " ^Hcizg f ^C " ^{1St jcdl} u ' ^h ™ ^ ίϋ "rf' known device only hcauch be. Te * ^ J ^ _{mixture on eincn}

^{ie d}

with means for increased heat exchange, in particular with a tune channel (37) dividing, with the wall (29) .η thermally conductive contact standing tube bundle (37 a), is provided.

4. Heating gas generator according to one of the claims 1 to 3, thereby gekennze.chnct. that the surrounding the flame cone housing (20) r.ngform.g Abluftzuleitung.kanal (25) at his Exit with means such as blades (31) or the like for generating or supporting emer helical The rotational flow of the exhaust air

see is. _A.

5. Heating gas generator after one of the

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through the

to the ^

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chamber ■ «£»

Invention is especially that to create a process even under unfavorable ^ Reliable, into - ^ _wcitg ehcnde utilization of the heating gases, intensive mixing ^ Ab, uf, or the exhaust gas and thus ^ _Wirku "gsgrads the Nachvcr -

f _{chcn and} an extinguishing of the flame j .chcn ^ _{Ab to ver} .

^ " ^or _{consists accordingly} ß that

The exhaust air duct surrounding the _{fi ka el housing is open mixed} .

and exhaust air and ^{in the} Ä _citungskan |, neighboring

^{current direction in}

housing wall (23, 24) tn current direction towers above '' · ^Äir - " ¹ ^ for the return of the

In the hot zone of the »heating gas generator

Learn the heating gas-Luftgemfech under the ^ lnje ^ -

L Abcüung to Hci ^ -LungemUchs an Kalolytbramcr (46) "" ordered "1.

The invention therefore sees ninaus ei.ta _F .ci.n «u. the claims 2 to 6 measures to the

Heat condition of the idle gas generator continues to be heated gas and the exhaust air from the supply duct 25

better and, in particular, the highest possible temperature takes place via a conical channel 25 «, which eiiv.-r-

ensure peralur in the mixing chamber by hand through the conical mouth wall 24 of the

counteracted a heat dissipation and the ab- Flammkegelgehäuses and on the other hand by a

supplying heating gas-air mixture contained heat 5 tapering wall part 30 of the supply duct

is formed for additional heating of the heating gas generator 25, the wall part 30 for conical

lv.w. the exhaust air to be introduced into this (or what see mouth wall 24 is axially offset and with

each: .i this term is included - the twist scoops 31 is provided. around the in Pfeilrich-

belrelleiiden exhaust gas) and in the mixing chamber Ιιιημ.ν ,; Exhaust air exiting into the mixing chamber 28

educated Gcmischs is used. io to give an additional twist or the screw

In the drawing, an embodiment of the shaped flow of the mixed air is to be supported.

l ^:. The mixing chamber 28 is

I fig. I a horizontal section of a partition wall forming the air heater of the supply pipe V)

.lüL'icüats enclosed in a ring with a Hei / "as- 29" according to the invention. This partition ends

generator, approximately in the section along line l-l in Fig. 2. 15 on the one hand at a certain distance from the

l ^: ig. 2 a vertical section along line 2-2 of the wall 33. which axially separates the mixing chamber 28

l'ig. 1 and closes so that between the partition wall 29 and α

F ig. 3 shows a detail of Figure I in greater Kndwand 33 of a r. '; .Gförmiger Durchtrittsijuer-

Mül'.stabc. cut 34 is created; on the other hand, she j _s t with schlilz-

Provided over a drying 20-shaped opening 35 through which the

Chamber 10, the air heater unit 11 is arranged from the mixing chamber 28 into the same ring-shaped

net. Air is released from the drying chamber in the return duct 36 surrounding the arrow in the direction of the arrow x,

Direction r, sucked in by fans 12 and 13. Overflowing hot gas-air mixture in the direction of the arrow

which at the same time fresh air flows back into the mixing chamber 28 in the direction of arrow X ₁ via x _s

a supply space 14 is supplied. 25 can, under the injector effect that the

The mixture of circulating air and fresh air is drawn in arrow direction from the flame chamber 20 or from its mouth.

tung ν .; a heat exchanger 15 fed to the heating gas exiting in the mixing chamber 28 in manure 24

a space 16 within the air mixture with an insulation 17 exerts.

provided air heater unit 11 is arranged The of the mixture to be discharged through-

and in the manner to be described later, the 3 ° -flowing drainage duct 37 is also heated

will. A tube bundle 37 ″ passes through in the longitudinal direction from the room 16, among other things, the fresh air circulating air, where-

air-Ciemisch back into the drying chamber 10 at the pipe walls of the bundle with the exhaust gas

back. supply channel 25 and the mixture line channel

A part of the circulating air is bound by a line 35 from the fans 12 and 13 or from a 37 separating supply pipe 29 in a thermally conductive manner, in such a way that one side. the exiting 18 in the direction of the arrow x, as exhaust air to a Heiz.gaserzeu- heating gas-air mixture, an additional guide receives ger Ii ', which has a flame cone housing 20 and on the other hand the still hot mixture has a heating nozzle 21 and in Fig the incoming exhaust air, as shown on a larger scale. on the other hand also from the inside through the in the

Through the Brenndüsc 21 the fuel, for. B. 40 flame chamber 26 generated heating gases on the

liquid fuel to which combustion air, for example ribs or needles 27, is heated,

is fed concentrically at 22, into the interior of the das through the discharge channel 37 in the direction of the arrow

Flammkegelgehäiises 20 is injected and there on _{flow X 9} flowing hot gas-air mixture is through

dear suitable way kindled. The Flammkcgel- a line 41 fed to the heat exchanger 15,

housing 20 is essentially made up of a tube 45

shaped wall 23 with a conical mouth 24 formed in the direction of arrow X ₁₀ through which a flow passes through the first stage 42.

and from an annular exhaust air supply duct to a chamber 43 through which flow _{occurs in the direction of arrow X 11}

25 ι closed, in which the evacuation line 18, like loading and one in the direction of arrow x,., Flowed through the second

special Fig. 2 shows, opens tangentially, so that step 44 is formed

the exhaust air flowing in in the direction of arrow X ₅ diverts the exhaust mixture in the direction of arrow X ₁₃ . In the cam-

air supply duct flows through helically. mer 43 i- 1 housed a catalytic burner 4i, the

To increase the heat transfer between the from the in Pfcilrichtungx ,, from the first to the Interior of the flame cone housing 20 forming the second stage of the heat exchanger overflowing Flame chamber 26 and the exhaust air supply duct mixture flows through and for additional

25, the wall 23 with ribs or needles 27 burns any combustible components that are still present

see, which serves both in the flame chamber 26 as in the mixture. The catalytic burner works in

also protrude into the exhaust air supply duct 25 compared to the temperature in the flame chamber 26

and thereby a good burnout of the fuel, only at a relatively low temperature,

especially with evaporation of liquid fuel z. B. usually in a range between 300

Substance, and an intensive heat transfer to the outlet 60 and 350 ° C. It is useful in one place.

air causes. built in which there is a suitable mixed gas temperature

Flammenkamrer 26 and exhaust air duct 25 can be reached and an easy way for

open into a mixing chamber 28. The supply revision, installation and removal of the catalytic converter

For this purpose, tube 29 is handled via the flame cone.

housing 20 extended axially out, with one 65 The operation of the F.inrich-

The extension forming the partition wall 29a essentially goes from the above description without

borrowed the mixing chamber 28 limited. The other things together emerge:

leadership of the generated in the flame chamber 20 while the .c, from the drying chamber

incoming circulating air, mixed with fresh air from x, and _{returning to the dic'Trocknungskammcr in Pfeilrichuing Jr 3} is heated by the stages 44 and 42 of the heat exchanger 15, occur partial currents of the circulating air in the direction of x. \ and x ?, tangential to the Burning nozzle 21 or inlet duct 25 concentric to the flame chamber 26, so that they flow through it in a helical manner and mix with the heating gases from the flame chamber at the nozzle-shaped mouth 24 of the flame chamber 26 or in the mixing chamber 28 by rotating them over the swirl chamber 31 provided conical channel 2Sa flow into the heating gases. The hot gas-air mixture formed in this way flows in direction xi into the return duct 36 and from there partially through the discharge duct 37 or the tube bundle 37 λ dividing the same to the heat exchanger 15, but mostly under the ejector effect of the heating gases or the hot gas-air mixture in Path direction jr _R back into the mixing chamber so that the heating gases pass through the mixing zone in the mixing chamber 28 many times, for example ten to twenty times on average, in the sense of a loop factor, before they are wcitcrgclcitct to the heat exchanger. This results in an intensive mixture of the heating gas and air constituents of the gas mixture and thus extensive combustion (coarse combustion) of the still combustible components contained in the exhaust air.

A residual or fine combustion then takes place in the intermediate chamber 43 between the first and the second stage of the heat exchanger 15 on the catalyst 46 instead. By appropriately dimensioning the supply and discharge lines or the heat exchanger and by Suitable control of the amount of exhaust air can be achieved that the first stage 42 flowing through

ίο mixture has a certain temperature, e.g. B. between 300 and 350 ° C, so that the Katalylbrcnncr 46 the highest possible residual combustion of the combustible ones still contained in the hot gas-air mixture Can make components. The generated

The heat of combustion is then used in the second stage 44 of the heat exchanger to _{heat the circulating air flowing through the heat exchanger in PfcUrichtung Jt 3} in conjunction with the first stage 42, so that overall maximum possible utilization the heat contained in the mixture is measurable. At the same time, a special air heater for the circulating air is saved.

Ikizcrzcugcr and Katalytbrnner, if necessary in Prevention with the heat exchanger 15, so can

is to be trained that they can also be used subsequently an existing circulating air heating system or without significant changes to a normal air heater can be incorporated.

1 sheet of drawings

Claims (1)

The invention is based on a Heizgaserzcu- 1. Hci / gaser / cugcr for dnc system for surface treatment. e.g. of painted objects, with a treatment. z. B. Paint drying chamber, a heat exchanger operated by means of Heizuas generated from fuel stubs indirect heating by the Behändlunuskammer ImluftWoms sucked in by a fan with a flammable component branched off from this on the blower pressure side containing the exhaust air stream replaced by fresh air, which the cylinder housing of the ^ _{fc kammcr} , a m lungs - - ^ LU ™ _n heating gas operated ^ "Sschcr / ur indirect heating cm" by ^; ¹ ™ ¹ ^ ™ blown off before hand and ka ^ _{& on d} saugU.UmIutr ¹ ^ .. _burning cash holdings ^ '^^ ^ fresh air ducted replaced · ■> c U ^' Jj ^ squib case of ömenden from the Brcnnsrom de '^' ^b _{rs cntslr} flames ^{u ^ ^d. "" ^ "Formii flows around, cone ^ rough ^ n ' y ^ ^ fuel for the Bc Vei ^ nüi g ^ ^ _H